Producing fast dyeings on the fiber.



UNITED STATES PATENT OFFICE.

RICHARD HERZ, 0F FRANKFORT-ON-THE-MAIN, GERMANY, ASSIGNOR TO CASSELLA COLOR COMPANY, A CORPORATION OF NEW YORK.

PRODUCING FAST DYEINGS ON THE FIBER.

No Drawing.

Specification of Letters Patent. Patented Aug. 11 1914,

Application filed February 21 1913. Serial No. 749,845.

To all whom it may concern: Be it known that I, RICHARD Hnnz, Ph. a subject of the King-of Prussia, and a res1-- dent of Eysseneckstrasse 17, Frankfort-onthe-Main, Germany, have invented certain new and useful Improvements in Producing Fast Dyeings on the Fiber, of which the following is a full description.

I have found that amino-and alkylamino-compounds of carbazole and of its '(N-)substituted derivatives may be employed for developing dyeings diazotized on the fiber. The polyaminocompounds, particularly the tetraamino compounds of carbazole and of its (N-)substituted derivatives are especially suitable for this process, and the shades so produced are distinguished by exceptionally good fast-ness to llght. The material is dyed or padded in the customary manner with diazotizable colors, or with compounds possessing free amino groups,

' which colors or compounds are subse uently diazotised and developed with-the so utions of the above-named derivatives of carbazole. The method of production is illustrated by the following examples:

Example I: Dye in the customary manner with 4% primuline (see Fdrbsto/ftabellen by," Gr. Schultz, 5th edition, page 211, N0. 616);

rinse, diazotize, and develop in a bath containing a weight of the hydrochlorid of tetraaminocarbazole equal to 11; to 1% of the weight of the goods. In order to neutralize the free mineral acid, a small quantity of soda or sodium acetate may be added to the developing bath. The dyeings are rinsed and dried; by this method deep brown shades are obtained, possessing extreme fast ness to washing. If in the place of the tetraaminocarbazole, the tetraamino (N)- ethylcarbazole is used as a developer, the dyeing has a fast purplish brown color, whereas monoaminoand diaminocarbazoles yield with diazotized primulin more olivebrown, monoand diamino (N) ethylcarbazole yellowish olive shades.

Example II: Dye in the customary manner with 5% diaminogene (see Farbstofitabellen by G. Schultz, 5th edition, page 92, No. 274,) extra, diazotize, rinse, and develop as described above with the hydrochlorid of tetraaminocarbazole, rinse, soap with 5 grams soap per liter for about 3 minutes at 40-50 (1., rinse again, and dry. In this "1M1? m verv good fastness thus to washing and exceedingly good fastness to llght is obtained. The same result is obtained by developing with the hydrochlorid of'tetra-amino (N)-methyl carbazole, while 1. aminocarbazole the tetra-amino-carbazole or tetra-amino(N)alklycarbazole, blackish violet shades, and when using diaminocarbazoles, reddish violet shades of the same fastness are obtained.

Example IV: Dye in the customary manner with 4%' diamin azo scarlet 4B .(see Farbsto/ftabellen by G. Schultz, 5th edition, page 383,) diazotize, rinse, and develop with the hydroohlorid of tetra-amino(N)ethylcarbazole; brick red shades result having good fastness to washing.

Example V: Dye with 6 8% diazo light yellow G (see Farbstofltabellen by G. Schultz,

5th edition, page 386,) rinse and 'diazotize. If developing with the hydrochlorid of tetraaminocarbazole, brown shades, while if developing with tetra-amino (N) ethylcarbazole, red brown shades of excellent fastness to washing'and'light are formed.

Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what -I claim is 1. The process for producing fast dyeings on the fiber which consists in developing diazotizable coloring matters on the fiber by coupling the diazotized coloring matters with amino-derivatives of a carbazole compound,-

substantially as described.

2. The rocess for producing fast. dyeings on the fi er which consists in developing diazotizable coloring matters on the fiber by coupling the diazotized coloring matters with amino-derivatives of (N) substituted carbazole compounds, substantially as described.

8. Theprocess for producing fast dyeings on the fiber which consists in developing produced. When substituting for the tliazotizablo coloring matters on the fiber by coupling the diazotized coloring matters with te'trzianiino derivatives of :1- carbazole compound; substantially as described.

4. The process for producing fast (lyeings on the fiber which consists in developing diuzotizable coloring matters o3. Lhe fiber by coupling the diazot'ized coloring matters with tetraamino derivatives of (N) substituted ca'vbazole compounds substantially scribed. v

'In witness whereof I have hereunto signed my name this (5th day of Feb. 191$ in the presence of two subscribingwitnesses.

us (lc- 10 \Vitncsscs:

JEAN (lnunn, CARL GRUM).

' Copies of this patent may beobtained for five cents each, by addressing the "Commissioner of Patents,

' Washington, D. G. 

